Covert and Side Channels Due to Processor Architecture

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Covert and Side Channels Due to Processor Architecture
Information leakage through covert channels and side channels is becoming a serious problem, especially when these are enhanced by modern processor architecture features. We show how processor architecture features such as simultaneous multithreading, control speculation and shared caches can inadvertently accelerate such covert channels or enable new covert channels and side channels. We first illustrate the reality and severity of this problem by describing concrete attacks. We identify two new covert channels. We show orders of magnitude increases in covert channel capacities. We then present two solutions, Selective Partitioning and the novel Random Permutation Cache (RPCache). The RPCache can thwart most cache-based software side channel attacks, with minimal hardware costs and negligible performance impact.
Zhenghong Wang, Ruby B. Lee
Added 10 Jun 2010
Updated 10 Jun 2010
Type Conference
Year 2006
Authors Zhenghong Wang, Ruby B. Lee
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